[add] pubmed engine

tests/unit/engines/pubmed.py

@@ -0,0 +1,37 @@
+# -*- coding: utf-8 -*-
+from collections import defaultdict
+import mock
+from searx.engines import pubmed
+from searx.testing import SearxTestCase
+
+
+class TestPubmedEngine(SearxTestCase):
+
+    def test_request(self):
+        query = 'test_query'
+        dicto = defaultdict(dict)
+        dicto['pageno'] = 1
+        params = pubmed.request(query, dicto)
+        self.assertIn('url', params)
+        self.assertIn('eutils.ncbi.nlm.nih.gov/', params['url'])
+        self.assertIn('term', params['url'])
+
+    def test_response(self):
+        self.assertRaises(AttributeError, pubmed.response, None)
+        self.assertRaises(AttributeError, pubmed.response, [])
+        self.assertRaises(AttributeError, pubmed.response, '')
+        self.assertRaises(AttributeError, pubmed.response, '[]')
+
+        response = mock.Mock(text='<PubmedArticleSet></PubmedArticleSet>')
+        self.assertEqual(pubmed.response(response), [])
+
+        xml_mock = """<eSearchResult><Count>1</Count><RetMax>1</RetMax><RetStart>0</RetStart><IdList>
+<Id>1</Id>
+</IdList></eSearchResult>
+"""
+
+        response = mock.Mock(text=xml_mock.encode('utf-8'))
+        results = pubmed.response(response)
+        self.assertEqual(type(results), list)
+        self.assertEqual(len(results), 1)
+        self.assertEqual(results[0]['content'], 'No abstract is available for this publication.')